| Business | Phone |
| Guice Engineering Sciences 300 E Tyler St # 200, Longview 75601 | (903) 757-4701 |
| Heartland Tour Bus Co 415 N Center St, Longview 75601 | (903) 758-5180 |
| Johnson & Pace Engineering 1201 W Loop 281, Longview 75604 | (903) 753-0663 |
| Bass Engineering Co 3200 Brent Rd, Longview 75604 | (903) 759-1633 |
| E Ray Greenman & Assoc 2810 Bill Owens Pkwy # 205, Longview 75605 | (903) 297-5717 |
| Eastex Engineering 788 Forest Lk, Longview 75605 | (903) 663-5897 |
| Eastex Engineering Assoc 1616 Judson Rd # 4, Longview 75601 | (903) 236-7040 |
| Electrical Expertise Inc 6 Alice Cir, Longview 75605 | (903) 297-7811 |
| Engineering Assoc Inc Longview 75601 | (903) 234-1231 |
| Ettl Engineers & Consultant 707 W Cotton St, Longview 75604 | (903) 758-0402 |
| R & J Engineering Inc 9 Gum Valley Cir, Longview 75602 | (903) 757-9131 |
| Nrs Consulting Engineers 2126 Alpine St, Longview 75601 | (903) 758-2010 |
| Lewis Engineering 134 Briarmeadow Dr, Longview 75604 | (903) 759-5300 |
| Maly & Assoc 5019 Judson Rd, Longview 75605 | (903) 663-6661 |